Reenforced plaster base



Sept. 15,1936. L, JQHNSQN 2,054,085.

REENFORCED PLASTER BASE Filed July 28, 1932 2 Sheets-Sheet 1 .9 J6mvEN-roR LLOYD FJOHNSQN.

Sept. 15, 1936. F. JOHNSON REENFORCED PLASTER BASE Filed July 28, 1932 2Sheets-Sheet 2 0 Rs Y .3 W NM R W1 0 NF m D u w v.. B 0 1 Patented Sept.15, 1936 PATENT OFFICE aosaoss v V REENFORCED rLAs'rE z. BASE Lloyd F.Johnson, Wheaten, 111., assignor to United States Gyp m a corporation ofIllinois Company, Chicago, 111-,

Application July 28, 1932, Serial No.- 625,250 10 Claims. (01. 12-124This invention relates to building construetions, and has reference moreparticularly to plaster boards having joint reenforcing strips mountedupon the board at the time of shipment.

In erecting plaster boards, such as those madeof vegetable fibers or acementitious core composition with paper cover sheets, as gypsum board,it is customaryto cover'the joints between plaster boards with metallicreenforcing strips prior to application of plaster, for the purpose ofpreventing cracks in the plaster at the board joints.

'It is preferable to have these strips attached to the plaster board atthe time of shipment so as to reduce the amount of high priced labornecessary for erection at the job. However, the endeavor to market fiberboards with strips of metal mesh extending beyond the edge of the boardhas met with difficulty since the product is very difficult to pack forshipment, and furthermore, the overhanging metallic strips are apt toinjure the handsof the workmen. The over- "hanging strips also make itdifficult to nail the plaster board to the supporting studs.

An object of this invention, therefore, isto provide a plaster boardhaving a reenforcing metallic strip sli'dably positioned adjacent anedge or edges of the board at the time of shipment.

Another object of the invention is to provide a plaster board unitconsisting of a plaster board with reenforcing strips attached to theface ad- Jacent an edge and movable out of operative position so as topermit ready nailing of the plaster board to studding with a minimum oflabor, and also to permit easy packing and shipment.

A further object of the invention'is to provide a plaster boardreenforced unit in which a reenforcing strip is slidably attached to theface of the board so that it requires no further nailing prior to theapplication of a coating of plaster; also to improve buildingconstructions in other respects hereinafter specified and claimed.

Reference is to be had to the, accompanying drawings forming part ofthis specification, in which Fig. 1 is a face view ofa wall embody ngtheimproved reenforcing means of the invention,

Fig. 2 is a sectional view through the wall'con, struction taken on line2-2 of Fig. 1,

Fig. 3 is a face view ofa plaster board with they reenforcing strip in aposition convenient for. packing and shipment,

1'13. 4 is a sectional view throughthe plasterboardtakenbnlinel-lnfl'ig8,

Fig. 5' is a face view 'of 'a modified form of plaster boardreenforcement. I r

Fig. 6; is a face view of a further modified form of plaster boardreenforcement, and s Fig. 7 is a face view of a wall embodying the 5reenforcing means shown in Fig. 6.

In Patent No. 1,740,493 to Birdsey and Manske,

a reenforcing strip is proposed for use ini'reenforcing the joints ofplaster boards, this strip being composed of two or more longitudinalwires l0 III to which have been welded cross wires I l'which terminatein return bent hooks l2. Patent No. 1,768,127 to Manske and McNeil,describes a machine for making joint reenforcing strips of this nature.

I have discovered that reenforcing strips'of the type described in thesepatents are especially adapted for use in formingplaster board unitsconsisting of plaster boards of fiber or paper covered composition andreenforcing o strips slidably attached'to the face of the plaster boardat the time of shipment. The plaster boards are preferably made of woodor other vegetable fibers, and may be provided with shiplappedlongitudinal edges l3 which interlock, ends of the g5 board may besecured adjacentthe board joints by nails H which are driven through theplaster board into a supporting stud l5. In order to attach thereenforcing' strip to the plaster board prior to shipment, I providestaples l6, which have legs ll driven through the plaster board andterminate in points I8 which are clinched at the rear face of theplasterboard. The staple i6 is spaced apart from the front face of theplaster board so as to slidably receive one of the cross 35 wires l I.The staple I6 is set back from the edge of the plaster board so thatduring shipment and during the time that the boards are erected on studsI! by driving the nails It, the reenfor'cing lies out of operativeposition as shown in 0 Fig. 3. a

After the boards are nailed to the studs. the

- reenforcing strip is moved transversely with the wires Iii-slidingthrough the staples 16 so that the reenforcing strip overlies 'thelongitudinal 5 joint as seen in Fig. 1. A plaster coat" is now appliedover the plaster board, board joints and reenforcing strip in the usualmanner. Owing to the fact that the strip lies flat after ithas been Lstud is required 'prior to the application of the plaster 20, althoughsupplementary nailing of this nature-may be used if desired. .The boards1 (Fig. 1) are usually arrangedwith their longitudinal joints extendinghorizontally, and with the board joints staggered. The reenforcing stripis usually only necessary along the longitudinal edges of the board, butthey may be placed along the ends of the boards if desired.

In the preferred form of the invention, the staple I6 extends parallelwith the edge of the board and with the reenforcing strip. In themodified form of construction shown in Fig. 5, the staples 16a may beturned at right angles to the reenforcing strip and edge of the boardwith the staple embracing one of the longitudinal wires Ill. The staplelGa is preferably made somewhat longer than the staple I6 permittingsuilicient sliding movement, of the reenforcing strip so that it can liein either the inoperative position shown in dot and dash lines in Fig.5, or in the operative position shown by full lines in said figure. Withthis arrangement of the staple Ilia, the reenforcing strip may be movedlongitudinally as well as transversely into operative position so thatthe end of the strip overlies the corners of the boards to reenfo'rcethe corner joint.

While I have describedrthe use of a reenforcing strip as disclosed inthe aforementioned patents, any other suitable type of reenforcing stripmay be used as long as it permits the sliding movement of said stripfrom inoperative to operative position. The plaster board unit which Ihave disclosed is convenient for packing and shipment of the plasterboards due to the fact that the reenforcing strips do not project beyondthe edge of the board when they lie in inoperative position, and theseunits are also an advantage due to the fact that a free space ispermitted for nailing the plaster board units directly to the studswithout interference by the reenforcing strip. The plaster boards unitsare also an advantage in preventing injury to the hands of workmenduring erection of the plaster board units as the strips have no edgesprojecting beyond the edge of the board when they lie in inoperativeposition. As an example of another type of sliding reenforcing stripwhich might be used, those shown in Figs; 6 and 7 are cited. In thistype of strip, diagonally extending cross wires 23 are secured as bywelding to longitudinal wires 24. Staples 25 engage the cross wires sothat as the strips are moved transversely, they also automatically movelongitudinally to cover the joints at the corners of the boards.

I would state in conclusion that while the 11- lustrated examplesconstitue practical embodiments of my invention, I do not wish to-limitmyself precisely to those details, since manifestly,

strip to said board and securing the same in said plane, but permittingsliding movement of said strip in said plane to permit said strip to liein operative, overlapping position, or in inoperative position.

2. Ina plaster board unit, a plaster board. a reenforcing strippositioned adjacent an edge of said board in a plane substantiallyparallel to the face of the latter, and means for attaching said stripto said board and securing the same in said plane, but permittingsliding movement of said strip in said plane.

s. In a'building construction, a anof boards allel relation to the faceof said board, a portion of said strip being slidably supported betweensaid staple and the face of said board.

5. In a plaster board unit, a plaster board, a reenforcing stripcomposed of longitudinal and cross wires, said strip being positionedadjacent an edge of said board, and staples secured to said boardparallel to the edge thereof and engaging one of said cross wires toslidably secure said strip to said board.

6. In a plaster board unit, a plaster board, a reenforcing stripcomposed of longitudinal wires and cross wires having hook endsextendingbeyond said longitudinal wires, and staples for slid ablysecuring said strip to said board adjacent a board edge.

7. In a plaster board unit, a plaster board, a reenforcingstrip'composed of longitudinal and cross wires, and staples secured tosaid boardjand slidably connectin'gsaid longitudinal wires to saidboard.

8. 'In' a building construction, a pair of plaster .boards in edgeabutting relation, a stud, means of securing the edges of said boards tosaid stud, a metallic reenforcing strip secured to one of said boards ina'plane substantially parallel tothe face of the latter and arranged forsliding movement in said plane over the joint between said boards, and acoating of plaster over said strip and boards. said plaster servihg tolock said strip against sliding movement.

9. In a plaster board unit, a plaster board, a reenforcing stripcomposed of spaced longitudinal wires and-diagonal cross wires, andstaples secured to said board and slidably connecting said cross wiresto said board so as to cause the longitudinal actuation of said stripas,said strip is caused to move transversely. 1

10. In a plaster board unit, a plaster board, and a reenforcing stripconnected to said plaster board in a plane substantially parallel to theface of the latter so as to be capable of both-longitudinal and transvese sliding move- -ment in said plane.

morn r. JOHNSON.

